Lubricant composition



nite States This application is a continuation-in-part of ourapplication filed July 18, 1960, Ser. No. 43,335, now abandoned.

This invention relates to a novel lubricant composition particularlyuseful in molding and extrusion dies. More particularly, this inventionrelates to a novel dry composition capable of being admixed with wateror similar solvent for subsequent use as a mold release or extrusion dielubricant.

Heretofore, lubricants of the type to which this invention relates havecommonly been sold as dilute aqueous solutions of graphite or othersolid lubricant. The manufacturer generally suspended the solidlubricant in a colloidal solution and sold it in that form to the user.Transportation costs, as well as handling costs to provide the carenecessary to preserve the stability of the colloid, were high for thistype of material. In effect, the shipper was paying freight or ordinarywater. In addition, the handling of the colloidal solutions caused manydifficulties because breaking of the colloid by freezing, loss ofvolatile ingredients, contamination or rough handling had to be avoided.

These undesirable factors indicated a need for a dry powder form oflubricant which could be mixed with water at the site of use without theneed for specialized equipment. This was never heretofore possiblebecause either a very unstable lubricant solution was formed or else theingredients tended to ball when admixed at the site of the user. Thisballing results from the formation of agglomerates of the powders as thesuspending agents rapidly take up water to form a sticky film ofhydrated material, which resists further rapid solution or dispersion,either by agitation or by raising temperatures. Intense and fastagitation, coupled with high shear and controlled heat were required todisperse the dry ingredients. Obviously, the specialized apparatusneeded to perform such an operation was not readily available,especially in small shops where the composition is frequently used.Thus, the practice of shipping dilute solutions persisted.

In accordance with this invention, a dry mix form of lubricant suitablefor subsequent dilution by the mere addition of water or other solventis now possible. The novel composition of this dry lubricant comprisesgraphite, vermiculite or other similar solid lubricant admixed withcertain wetting agents and suspending agents and, if desired andnecessary, bonding agents and fungicide/ bactericides. This admixture iscapable of being easily diluted by the user to an aqueous lubricantsolution. The proper selection and proportions of wetting and suspendingagents prevents formation of agglomerates, which are difficult todisperse without loss of the performance characteristics of thesuspending agents.

dilution can be carried out to any desired degree, thereby 3,341,454Patented Sept. 12, 1967 enabling custom formulation of a lubricant atthe site of use for the users specific needs. This latter unexpectedadvantage broadens the scope of use for the basic lubricant compositionand, therefore, a warehousing advantage also arises.

More particularly, the composition of this invention comprises aphysical admixture of micronized graphite or expanded vermiculite with awetting agent and a suspending agent. If needed for the proposed end useof the lubricant composition, a bonding agent to prevent popping off inhot lubricant work and a fungicide/ bactericide to combat mold growthmay also be incorporated into the composition. The ingredients are mixedtogether by a unique process which provides for subsequent uniform,stable dilute suspension of the lubricant when diluted, without ballingor undesirable agglomeration of the solid lubricant particles. Thisprocess involves premixing the wetting, suspending, bonding andfungicide ingredients and then adding the solid lubricant thereto withcontinued agitation. Uniformly coated lubricant particles are therebyproduced in a dry form.

Since the largest concentration of the solid lubricant tolerable isdesired, its preferred concentration range can be stated as up to aboutIt is understood, of course, that some small portion of the product ofthis invention must always be made up of the additives necessary forproper dispersion in an aqueous liquid. The graphite used as the solidlubricant preferably has a particle size less than about 2.5 microns. Ifvermiculite is used as a substitute, it should be of the finely powderedexpanded type and should preferably have a particle size less than about45 mircons. (Whenever reference is made in this specification and claimsto the particle size of certain material, this is employed to meanmaximum particle size.)

Where a powdered chlorinated hydrocarbon is used to impart greaterextreme pressure properties, the additive is to be used in a proportionup to 30% by weight of the dry lubricant.

Where borax is used to enhance certain features of the dry lubricant, arange from about 2% to about 15% by weight is operable and 10% ispreferred.

The wetting agents capable of use in the composition of this inventionare those which do not act to pit or dull the surfaces of the extrudedor molded work. Such pitting or dulling is normally caused by corrosiveresidues formed by the thermic decomposition, frequently en counteredduring extruding operations, of the dilute lubricant solution. Among thewetting agents that have been found particularly useful are (l) theanionics of the alkyl, alkaryl sulphate and sulphonate type having aminimum alkyl chain length of 8 carbon atoms and the aryl sulphonatetype such as the alkyl isothionates, the alkyl sulphosuccinates, theN-alkyl taurates and the alkyl aryl sulphonates, (2) the cationicimidazoline salts of the phosphoric acids, (3) the nonionic condensationproducts of the alkylene oxides such as the condensation products ofethylene or propylene oxide, and mixtures thereof, with long chain alkylor alkaryl fatty acids (such as lauric, palmitic, myristic and oleicacids), long chain alcohols having 6 to 22 carbon atoms in the chain,fatty amines, fatty amides, alkyl phenols, or their derivatives, (4)high titer soaps of a high titer fatty material and an organic base oran alkali metal base, and (5) fatty alkanol amides (the oleoylcondensate); C H O-(C H O),,H (the .lauryl condensate); C H O-(C H O),,H(the tridecyl condensate); RC H O-(C H O),,H (the alkyl phenolcondensates);

i R-N-(CiH4o) H (the alkyl amine condensates); and

i? i RC' N(oflH40)nH (the alkoylamide condensates), where n is aninteger not less than 6, R is an alkyl group with a chain length of 6 to20 carbon atoms, and X is hydrogen or Examples of group 4 are ammoniumstearate, ammonium laurate, triethanolammonium laurate, sodium laurate,sodium hydrogenated tallowate, and the sodium salt of hydrogenated fishoil acids.

Examples of group are lauroyl diethanolamide, oleoyl diethanolamide,lauroyl monoethylanolamide, stearoyl diethanolamide, and lauroylmonoethanolamide.

The concentration of wetting agent utilized is up to about 2% by weightand preferably from about 0.5% to about 1.5%. The extreme lower limit isutilized where the suspending agent employed also functions as a wettingagent.

The suspending agent in the composition of this invention causes uniformdispersal of the active ingredients when the concentrated mixture issubsequently diluted into an aqueous lubricant solution. It is preferredthat such compounds have a high potential and uniform dispersion abilitywith a minimum need for agitation. While some settling of theingredients of the lubricant solution may occur, the amount should besubstantially negligible so that the lubricating performance thereofwill not be altered to any substantial degree. If undue settling occurs,it may cause agglomeration of the lubricant particles which subsequentlymight gall or scratch the Work upon which the lubricant is being used.Among the suspending agents found to possess these attributes are: theanimal and vegtable gums, such as agar-agar, guar gum, gum tragacanth,gum elemi, gum karaya and locust bean gum; the polyvinyl lactams havinga molecular weight of 50,000 to 400,000; the bentonitic clays,preferably those of high montmorillonite content; the alkyl celluloses,such as methyl cellulose, carboxymethyl cellulose, hydroxyethylcellulose; the polyacrylic acids having a molecular weight of 18,000 to100,000 and their alkali metal and ammonium salts (such as sodiumpolyacrylate), and pectin. They should have a concentration of fromabout to about 40% by weight and preferably about 15% to about 40%, withthe optimum concentration being about 32%.

In some instances certain suspending agents, when in aqueous suspensionor solution, are subject to attack by fungi and bacteria. To avoid thisundesirable possibility, resort is made to the inclusion of thefungicide/bactericide in a concentration range of up to about 5% byweight and preferably from about 0.5% to about 4%. Among thefungicide/bactericides found to be particularly effective in combatingmold growth are: monochlorophenol, pentachlorophenol, ortho phenylphenol, and their alkali metal salts.

In the use of the diluted lubricant composition of this invention,especially during extrusion and molding, high temperatures arefrequently encountered. Such high temperatures sometimes cause popingoff" of the aqueous lubricant from the hot die or mold face or from theworkpiece itself. This is exemplified by the phenomenon encountered whendrops of water are sprinkled upon a hot plateballs of water run off theplate or else almost explosively vaporize. To provide for sufiicientretention of the lubricant ingredients during any such hot molding orextrusion, a bonding agent is incorporated into the mixture. Suchbonding agent imparts a momentary adhering ability to the ingredients,suflicient to prevent their instantaneous poping off at hightemperatures. Such agents include the sugars such as dextrin, sucrose,molasses and glucose, the vegetable gu-ms, the seaweed gums and thepolyacrylates. They should constitute up to about 20% by weight of theconcentrate and preferably up to about 15%.

It has been found that on hard alloys of aluminum the use of graphitealone as the load carrier in the dry lubricant is not as efficient aswould be desired. Even the use of borax in the formulation does notsatisfy the requirements for extremely hard alloys. By including up to30% of a powdered resinous chlorinated parafiin it has been found thatthe lubricant requirements of even the hardest alloys are satisfactorilymet. The powdered resinous chlorinated paraflin preferred is known tothe trade as Chlorowax 70 supplied by the Diamond Alkali Company. Thisresin is a cream colored, non-toxic, resinous, chlorinated paraffin,containing about 70% by weight of chlorine. Actually, Chlorowax 70-8which is described as similar to Chlorowax 70 but specially stabilizedfor high temperature processing is even more suitable.

Use of the several embodiments of the composition of this invention,imparts a high order of lubrication to the articles being lubricated. Inaddition, the ability to dilute the composition at the site of usepermits custom formulation. 'For example, concentrations ranging from0.25% to 15% by weight can be made with equal ease for applicationsincluding use for extrusions (dies and dummy blocks), glassmaking moldslubricants, skid conveyors lubricants, chain lubricants, aluminum andbrass ingot mold lubricants, forging die lubricants, mandrel lubricantfor hot piercing, and gasket lubricants.

No occupational hazards such as dermatitis caused by irritation orsensitization, or burning caused by splattering of the hot aqueouslubricant in the vicinity of the work piece, is encountered. And neitherthe equipment nor the finished wor-k, whether extruded, molded orotherwise formed, evidences damage by scratching, galling, or similarundesirable action of the lubricant. This is in contrast to the highlyalkaline lubricant compositions heretofore used. To summarize, a highlyeffective non-toxic lubricant solution capable of dilution has resultedfrom the discovery of the composition of this invention.

It is to be noted that the formulation presented in Example I isextremely stable to modification by the user, if it is desired to usesome highly alkaline additives, although we have shown that thenecessity of this addition is obviated by the present invention. This isin contrast to the graphite and micaceous dispersions presentlyavailable, which are sensitive to the addition of electrolytes.

The following examples serve as more specific illustrations of theinvention:

Example I A dry mix of the following composition is made:

Percent Graphite (natural type having a maximum particle size of about2.5 microns and having less than 2% ash when fired) 63.56

Powdered sodium monochlorophenate 3.89 Powdered sodium dodecylbenzenesulphonate (90% active and having a particle size which passes through aNo. 30 sieve and is 80% retained on a No. 100 sieve, US. StandardScreen) 0.92

Carboxymethylcellulose (Grade 7H supplied by the Hercules Powder Co. ofWilmington, Del.) 31.63

The bactericide sodium monochlorophenate, the wetting agent sodiumdodecyl benzene sulphonate, and the suspending agentcarboxymethylcellulose are intimately mixed in a double helical ribbonmixer. After such premixing, the lubricant graphite is added and thewhole mass further tumbled. It is subsequently sieved to assure completedispersal of all the ingredients. The resultant mixture consists of adry composition of graphite coated with the premix.

It might be here noted that when all the constituents are mixed at thesame time, that is, not in the order indicated above, the productresulting therefrom does not disperse uniformly upon dilution withwater. The suspending agent, carboxyrnethylcellulose, tends to ball upand the mixture is extremely difficult to disperse in water. In fact,even after employing special mixing apparatus, agitation and heat forover 45 minutes, only a fair aqueous lubricant solution results. It isevident that the order of mixing is critical.

The dry' mixmade as indicated in the second paragraph above may bediluted for the following uses:

Percent Extrusions (dies and dummy blocks) .25-1 Glassmaking moldslubricant 1-5 Skid conveyors lubricant 1-5 Chain lubricant 1-5 Aluminumand brass ingot mold lubricant 1-5 Forging die lubricant 1-5 Mandrellubricant for hot piercing 515 Gasket lubricant 1-15 Percent Graphite(synthetic type having a maximum particle size of about 2.5 microns)59.0 Borax (powdered) 10.0 Powdered sodium monochlorophenate 3.0Powdered sodium dodecylbenzene sulphonate 1.0

Carboxymethylcellulose 27.0

The borax additive of this example is an auxiliary lubricant in that itprovides an adherent lubrication film property to the mixture.

The above composition is diluted for similar usage as indicated inExample I. In all instances, the diluted lubricant solution issatisfactory for the uses indicated.

Example 111 Percent Graphite 49 Chlorowax 7,0S 15 Powdered sodiummonochlorophenate 3 Powdered sodium dodecyl benzene sulphonate 1Carboxy, methyl cellulose 32 6 The Chlorowax 70S is blended into the mixat the same time as the graphite, as described in Example I. Theresultant composition is diluted similarly to Example I for the usesindicated.

Example IV Percent Graphite 63.5 Sodium monochlorophenate 3.0 Sodiumdodecyl benzene sulphonate 1.0 Carboxymethylcellulose 32.0

The condensation product of 20 moles of ethylene Carboxymethylcellulose31.63

Example VII Graphite 59.0 Borax 10.0 Sodium pentachlorophenate 3.0Sodium dodecyl benzene sulphonate 1.0 Carboxymethylcellulose 27.0

Example VIII Graphite 54.0 Powdered borax 10.0 Powdered sodiumo-phenylphenate 3.0 Powdered sodium dodecyl benzene sulphonate 0.92Carboxymethylcellulose 31.63

Example IX Expanded vermiculite (having a particle size from 0.25 to 45microns) 63.56 Powdered sodium monochlorophenate 3.89 Powdered sodiumdodecyl benzene sulphonate 0.92 Carboxymethylcellulose 31.63

Example X Vermiculite (expanded) 59.0 Powdered borax 10.0 Powderedsodiummonochlorophenate 3.0 Powdered dodecyl benzene sulphonate 1.0Carboxymethylcellulose 27.0

Example XI Graphite 64 Sodium monochlorophenate 3 Sodium dodecyl benzenesulphonate 1 Powdered polyvinyl carboxylic acid 15 Powdered borax 17Examples IV through XI are compounded as in Example I, with thelubricant portion being added as the last part of the mix. The resultantcomposition is diluted similarly to Example I for the uses indicated.

Example XII Percent Graphite 71 Sodium alkyl aryl sulphonate 1 Sodiummonochlorophenate 3 Carboxymethylcellulose 25 Example XIII Graphite 76Sodium alkyl aryl sulphonate 1 Sodium monochlorophenate 3Carboxymethylcellulose 20 The compositions of Examples XII through XVare dispersed in Water by dissolving one part of the dry concentrate to120 parts of water. Samples are taken of the supernatant portions overperiodic intervals as indicated in the table below and the suspendedsolids content determined. The results are as follows:

TABLE I Percent Soilds in Supernatant Percent Sedimentation Liquid Ex.

Original After 16 After 48 16 Hours 48 Hours Suspension Hours Hours XII.0. 590 0. 581 0. 578 1. 2. 0 XIII- 0. 636 0. 616. 0. 610 l. 6 2. 6XIV--- 0. 661 0. 648 0. 642 1. 8 2. 7 XV 0. 703 0. 679 0. 656 3. 4 6. 6

Example XVI Percent Graphite Sodium monochlorophenate 1(2-hydroxyethyl)-2-heptadecyl 2 imidazolinium monophosphate 1.0Carboxymethylcellulose 32.0 Example X VIl Graphite 64.0 Sodiummonochlorophenate 3.0

1(2-hydroxy ethyl)-2-heptadecyl 2 imidazolinium diphosphate 1.0Carboxymethylcellulose 32.0 Example XVIII Graphite 64.0 Sodium-o-phenylphenate 3.0 1(2-hydroxy ethyl)-2-heptadecy1- 2 imidazoliniumtriphosphate 1.0 Carboxymethylcellulose 32.0 Example XIX Graphite 64.0Sodium pentachlorophenate 3.0 Olcoyl condensate of 12 moles ethyleneoxide 2.0 Carboxymethylcellulose 31.0 Example XX Graphite 62.0 Sodiummonochlorophenate 3.0 Triethanolamine stearate 3.0Carboxymethylcellulose 32.0 Example XXI Graphite 62.0 Sodiummonochlorophenate 3.0 Sodium stearate 3.0

Carboxymethylcellulose 32.0

Example XXII Graphite 64.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0 Guar gum 32.0

Example XXIII Graphite 64.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0 Locust bean gum 32.0

Example XXIV Graphite 64.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0

Sodium alginate 32.0

Example XXV Hydroxyethylcellulose 3210 Example XX VII Graphite 64.0Sodium monochlorophenate 3.0 Sodium dodecylbenzene sulphonate 1.0Methylcellulose 32.0

Example XX VIII Graphite 64.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0 Pectin 32.0

Example XXIX Graphite 86.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0 Bentonite (40100% sodium montmorillonite)10.0

Example XXX Graphite 76.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0 Ammonium polyacrylate 20.0

Example XXXI Graphite 76.0 Sodium monochlorophenate 3.0 Sodiumdodecylbenzene sulphonate 1.0

Sodium polyacrylate 20.0

Example XXXII Example XXXIV Graphite 63.0

It is found that for certain use conditions, some of the suspendingagents indicated above impart a desirable adhesion -of the lubricant tothe dies during high tempera- .ture work. Forexample, the natural gumssuch as the vegetable and the seaweed gums will impart both a bondingand a suspending function. And the dextrins, the sugars and thepolyacrylates impart a partial suspending function to the mixture andtherefore may be increased in concentration up to 25% of the suspendingagent.

However, a more powerful supplementary suspending agent must be used insuch instances. Alternatively, the

suspending agent, hydroxyethyl cellulose also imparts a bonding agentfunction and, therefore, it could be used alone as both a suspending anda bonding agent.

It is understood, of course, that other modifications in the compositionof this invention may be made Without departing from the true spirit andscope of the novel concepts and principles of this invention.

We claim:

1. A lubricant preparation in particulate form suitable for subsequentmixing with aqueous media to produce an aqueous lubricant comprisingabout 64% by Weight of graphite, about 1% by weight of sodium dodecylbenzene sulphonate, about 31% by weight carboxymethylcellulose and about4% by Weight of sodium monochlorophenate, said concentrate beingessentially anhydrous and said graphite being maintained in particulateform by being coated with dry premixture of said other named components.

2. A lubricant preparation in particulate form suitable for subsequentmixing With aqueous media to produce an aqueous lubricant comprisingabout 60% graphite, about borax, about 3% sodium monochlorophenate,about 26% carboxymethylcellulose and about 1% sodium dodecyl benzenesulphonate, said concentrate being essentially anhydrous and saidgraphite being maintained in particulate form by being coated With drypremixture of said other named components.

3. A lubricant preparation in particulate form suitable for subsequentmixing with aqueous madia to produce an aqueous lubricant comprisingabout 63.5% graphite, a mixture comprising about 0.5% of thecondensation product of 20 moles of ethylene oxide and dodecyl phenoland about 1% sodium dodecyl benzene sulphonate, about 32%carboxymethylcellulose and about 3% sodium monochlorophenate, saidconcentrate being essentially anhydrous and said graphite beingmaintained in particulate form by being coated with dry premixture ofsaid other named components.

4. A lubricant preparation in particulate form suitable for subsequentmixing with aqueous media to produce an aqueous lubricant comprisingabout 64% expanded vermiculite, about 1% sodium dodecyl benzenesulphonate, about 31% carboxymethylcellulose and about 4% sodiummonochlorophenate, said concentrate being essentially anhydrous and saidvermiculite being maintained in particulate form by being coated withdry premixture of said other named components.

5. A lubricant preparation in particulate form suitable for subsequentmixing with aqueous media to produce an aqueous lubricant comprisingabout 63% by weight of graphite, about 2% by weight of lauroyldiethanolamide, about 32% by weight of carboxymethylcellulose and about3% by weight of sodium monochlorophenate, said concentrate beingessentially anhydrous and said graphite being maintained in particulateform by being coated with dry premixture of said other named components.

6. A lubricant preparation in anhydrous particulate form suitable forsubsequent mixing with aqueous media consisting essentially of 0.5% to2% by weight of the dry solids of a water soluble non-corrosive wettingagent selected from the class consisting of 1) the anionic alkyl,alkaryl sulphates and sulphonates in which the alkyl radical has a chainlength of 8 to 12 carbon atoms and aryl sulphonates, (2) the cationicimidazoline salts of the phosphoric acids, (3) the nonionic condensationproducts of polyalkylene oxide and mixtures thereof with a memberselected from the group consisting of long chain hydrocargon fattyacids, fatty alcohols, fatty amines, fatty amides and alkyl phenols, (4)high titer soaps of a high titer faty material and a base selected fromthe group consisting of organic bases and alkali metal bases, and (5)fatty alkanol amides; from about 10% to about 40% by weight of asuspending agent comprising a member of the class consisting of theanimal and vegetable gllIl'lS, the polyvinyl lactams having a molecularweight in the range between 50,000 and 400,000, the bentonitic clays,the alkyl celluloses, the polyacrylic acids having a molecular weight of18,000 to 100,000 and their alkali metal and ammonium salts and pectin;and the balance comprising particulate solid lubricant selected from theclass consisting of graphite and vermiculite maintained in particulateform by being coated With dry premixture of said Wetting and suspendedagents.

7. A lubricant preparation in anhydrous particulate form suitable forsubsequent mixing with aqueous media consisting essentially of 0.5% to2% by weight of the dry solids of a water soluble non-corrosive wettingagent selected from the class consisting of l) the anionic alkyl, 'alkaryl sulphates and sulphonates in which the alkyl radical has a chainlength of 8 to 12 carbon atoms and aryl sulphonates, (2) the cationicimidazoline salts of the phosphoric acids, (3) the nonionic condensationproducts of polyalkylene oxide and mixtures thereof With a memberselected from the group consisting of long chain hydrocarbon fattyacids, fatty alcohols, fatty amines, fatty amides and alkyl phenols, (4)high titer soaps of a high titer fatty material and a base selected fromthe group consisting of organic bases and alkali metal bases, and (5)fatty alkanol amides; from about 10% to about 40% by weight of asuspending agent comprising a member of the class consisting of theanimal and vegetable gums, the polyvinyl lact-ams having a molecularweight in the range between 50,000 and 400,000, the bentonitic clays,the alkyl celluloses, the polyacrylic acids having a molecular weight of18,000 to 100,000 and their alkali metal and ammonium salts, and pectin;0.5% to 5% by weight of a fungicide/b-actericide selected from the groupconsisting of monohydroxy mononuclear aromatic compounds, halogenatedmonohydroxy mononuclear aromatic compounds and the alkali salts thereofand the balance comprising a solid lubricant selected from the classconsisting of graphite and vermiculite maintained in particulate form bybeing coated with dry premixture of said wetting and suspended agents.

8. A lubricant preparation in anhydrous particulate form suitable forsubsequent mixing with aqueous media consisting essentially of 0.5 to1.5% by Weight of the dry solids of a water soluble non-corrosivewetting agent selected from the class consisting of (1) the anionicalkyl, alkaryl sulphates and sulphonates in which the alkyl radical hasa chain length of 8 to 12 carbon atoms and aryl sulphonates, (2) thecationic irnid-azoline salts of the phosphoric acids, (3) the nonioniccondensation products of polyalkylene oxide and mixtures thereof with amember selected from the group consisting of long chain 11 hydrocarbonfatty acids, fatty alcohols, fatty amines, fatty amides and alkylphenols, (4) high titer soaps of a high titer fatty material and a baseselected from the group consisting of organic bases and alkali metalbases, and fatty alkanol amides; from about 15% to 40% of a suspendingagent comprising a member of the class consisting of the animal, andvegetable gums, the polyvinyl lactams having a molecular weight of50,000 to 400,000 and their alkali metal and ammonium salts, the alkylcelluloses, the polyacrylic acids having a molecular Weight of 18,000 to100,000 and their alkali metal and ammonium salts and pectin; and thebalance comprising a solid lubricant selected from the class consistingof graphite and vermiculite maintained in particulate form by beingcoated With dry premixture of said wetting and suspended agents.

9. A lubricant preparation in anhydrous particulate form suitable forsubsequent mixing with aqueous media consisting essentially of .5 to1.5% by Weight of the dry solids of a water soluble non-corrosivewetting agent selected from the class consisting of (1) the anionicalkyl, alkaryl sulphates and sulphonates in which the alkyl radical hasa chain length of 8 to 12 carbon atoms and aryl sulphonates, (2) thecationic imidazoline salts of the phosphoric acids, (3) the nonionicpolyalkyl rle oxide condensation products of the fatty acids and theirderivatives, (4) high titer soaps of a high titer fatty material and abase selected from the group consisting of organic bases and alkalimetal bases, and (5 fatty alkanol amides; from about 15 to 40% of asuspending agent comprising a member of the class consisting of theanimal and vegetable gums, the polyvinyl lactams havin a molecularweight in the range between 50,000 and 400,000, the bentonite clays,thealkyl celluloses, the polyacrylic acids having a molecular weight of18,000 to 100,000 and their alkali metal and ammonium salts, and pectin;0.5% to 5% by Weight of a fungicide/bactericide selected from the groupconsisting of monohydroxy mononuclear aromatic compounds, halogenatedmonohydroxy mononuclear aromatic compounds and the alkali salts thereofand the balance comprising a solid lubricant selected from the classconsisting of graphite and vermiculite maintained in particulate form bybeing coated with dry premixture of said wetting and suspended agents.

References Cited UNITED STATES PATENTS 804,455 11/1905 Cornstock 252221,168,050 1/1916 Benbow 25229 1,724,134 8/1929 Iredell 25222 2,588,6253/1952 Ferner et al. 25229 2,735,814 2/1956 Hodson et al. 252292,753,305 7/1956 Whitbeck 252493 2,825,693 3/1958 Beaubien et al.25249.3 3,047,526 7/1962 Stephens et al. 25229 OTHER REFERENCES DagColloidal Graphite, (Acheson Colloids Co., Port Huron, Mich. (BulletinNo. 435) (1952).

DANIEL E. WYMAN, Primary Examiner.

I. VAUGHN, Assistant Examiner.

7. A LUBRICANT PREPARATION IN ANHYDROUS PARTICULATE FROM SUITABLE FORSUBSEQUENT MIXING WITH AQUEOUS MEDIA CONSISTING ESSENTIALLY OF 0.5% TO2% BY WEIGHT OF THE DRY SOLIDS OF A WATER SOLUBLE NON-CORROSIVE WETTINGAGENT SELECTED FROM THE CLASS CONSISTING OF (1) THE ANIONIC ALKYL,ALKARYL SULPHATES AND SULPHONATES IN WHICH THE ALKYL RADICAL HAS A CHAINLENGTH OF 8 TO 12 CARBON ATOMS AND ARYL SULPHONATES, (2) THE CATIONICIMIDAZOLINE SALTS OF THE PHOSPHORIC ACIDS, (3) THE NONIONIC CONDENSATIONPRODUCTS OF POLYALKYLENE OXIDE AND MIXTURES THEREOF WITH A MEMBERSELECTED FROM THE GROUP CONSISTING OF LONG CHAIN HYDROCARBON FATTYACIDS, FATTY ALCOHOLS, FATTY AMINES, FATTY AMIDES AND ALKYL PHENOLS, (4)HIGH TITER SOAPS OF A HIGH TITER FATTY MATERIAL AND A BASE SELECTED FROMTHE GROUP CONSISTING OF ORGANIC BASES AND ALKALI METAL BASES, AND (5)FATTY ALKANOL AMIDES; FROM ABOUT 10% TO ABOUT 40% BY WEIGHT OF ASUSPENDING AGENT COMPRISING A MEMBER OF THE CLASS CONSISTING OF THEANIMAL AND VEGETABLE GUMS, THE POLYVINYL LACTAMS HAVING A MOLECULARWEIGHT IN THE RANGE BETWEEN 50,000 AND 400,000, THE BENTONITIC CLAYS,THE ALKYL CELLULOSES, THE POLYACRYLIC ACIDS HAVING A MOLECULAR WEIGHT OF18,000 TO 100,000 AND THEIR ALKALI METAL AND AMMONIUM SALTS, AND PECTIN;0.5% TO 5% BY WEIGHT OF A FUNGICIDE/BACTERICIDE SELECTED FROM THE GROUPCONSISTING OF A MONOHYDROXY MONONUCLEAR AROMATIC COMPOUNDS, HALOGENATEDMONOHYDROXY MONONUCLEAR AROMATIC COMPOUNDS AND THE ALKALI SALTS THEREOFAND THE BALANCE COMPRISING A SOLID LUBRICANT SELECTED FROM THE CLASSCONSISTING OF GRAPHITE AND VERMICULITE MAINTAINED IN PARTICULATE FROM BYBEING COATED WITH DRY PREMIXTUE OF SAID WETTING AND SUSPENDED AGENTS.